Word: maxima
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Dates: during 1923-1923
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...stars of the same color type would be greatest in the same parts of their spectra, but surprising differences were found. Vega and Sirius are both blue-white stars, but the maximum heat of Vega is much farther toward the violet than that of Sirius. Rigel (blue) shows two maxima, one of which is in the infrared rays, invisible to the human eye. The apparatus detects differences of a hundred-millionth of a degree of heat. That is not enough, say the astronomers. It must be sharpened to a thousand-millionth, and many fainter stars of every type must...